Thanks, I will make a v2 and post it shortly to correct for my terribly embarrassing omission caused by even more terribly embarrassing ignorance. -Kevin -----Original Message----- From: Chris Wilson [mailto:chris@xxxxxxxxxxxxxxxxxx] Sent: Tuesday, December 5, 2017 12:39 PM To: Rogovin, Kevin <kevin.rogovin@xxxxxxxxx>; intel-gfx@xxxxxxxxxxxxxxxxxxxxx Subject: RE: [PATCH 3/3] i965: check scratch page in a locked fashion on each ioctl Quoting Rogovin, Kevin (2017-12-05 10:30:04) > Hi, > > > Per context, then you can remove the locking. It's fitting since the scratch page is per-context anyway. > > The scratch page is per context? This I did not know, I thought it was per PPGTT. If that is the case, then my proposed interface to get/set the scratch page contents is wrong because it does not pass the HW context id. Yes, it per-vm, which is per-ctx on everything you want to investigate on. gen4-7 it is a global GTT with a global scratch, and just a mutex inside one process is not going to give you atomicity. -Chris _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx
